For instance, someone who always buys cheap products that will have a higher cost in the long run due to inadequate quality. Or someone who does not change the oil on his car because "it's expensive".
Note that I'm not talking about someone who cannot afford to change the oil. I'm talking about someone who make decisions that are obviously non-economical, but they are made for economic reasons. Another typical behavior could be refusing to buy insurance.
There's a word in Swedish that describes this: "dumsnål" which roughly translates to stupid (dum) greedy (snål).
However, do note that these people often can be generous. So "greedy" is not really an accurate description.